Sintering of ZrO[sub 2]-CeO[sub 2] spherical powders prepared by a water extraction variant of the sol-gel process
- Inst. of Nuclear Chemistry and Technology, Warsaw (Poland)
- ENEA, Rome (Italy)
- Univ. La Sapienza, Rome (Italy). Dept of Chemistry
Fully and partially stabilized ZrO[sub 2] solid solutions are one of the most extensively studied solid oxide electrolyte systems due to the many practical applications of these materials. Spherical powders (with diameters <100 [mu]m) of zirconia-ceria hydroxide gels (stabilized with nitrates or chlorides) were fabricated by a water extraction variant of the sol-gel process. The resulting powders were calcined at 400, 600, and 800 C in order to obtain crystalline forms, subsequently pressed at various pressures, and then sintered for 8 h at 1,700 C. The sintered pellets had relatively high geometric density (in some cases > 95% of the theoretical density) and showed both tetragonal and/or cubic X-ray phases. The bulk density values of these ceria-doped zirconia sintered pellets are much higher than those obtained for the CaO- or Y[sub 2]O[sub 3]- doped zirconia samples prepared by the same process.
- OSTI ID:
- 6148865
- Journal Information:
- Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 140:8; ISSN JESOAN; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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ALKALINE EARTH METAL COMPOUNDS
BULK DENSITY
CALCINATION
CALCIUM COMPOUNDS
CALCIUM OXIDES
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
DENSITY
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTROLYTES
EVALUATION
EXPERIMENTAL DATA
FABRICATION
FUEL CELLS
INFORMATION
MATERIALS WORKING
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHYSICAL PROPERTIES
POWDERS
PRESSING
PYROLYSIS
RARE EARTH COMPOUNDS
SINTERING
SIZE
SOL-GEL PROCESS
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES